JPS62281294A - Thin film el panel - Google Patents
Thin film el panelInfo
- Publication number
- JPS62281294A JPS62281294A JP61123522A JP12352286A JPS62281294A JP S62281294 A JPS62281294 A JP S62281294A JP 61123522 A JP61123522 A JP 61123522A JP 12352286 A JP12352286 A JP 12352286A JP S62281294 A JPS62281294 A JP S62281294A
- Authority
- JP
- Japan
- Prior art keywords
- desiccant
- cover
- adhesive
- thin film
- transparent substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010409 thin film Substances 0.000 title claims description 9
- 239000002274 desiccant Substances 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 17
- 230000001070 adhesive effect Effects 0.000 description 17
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 14
- 229920006332 epoxy adhesive Polymers 0.000 description 10
- 125000006850 spacer group Chemical group 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000006059 cover glass Substances 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は、平面形ディスプレイ装置などに用いられる薄
膜ＥＬパネルに関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a thin film EL panel used in flat display devices and the like.
薄膜εＬパネルは、一般にガラス基板上にストライプ状
透明電極を配置し、その上に誘電体層（第１の誘電体層
）、発光層および誘電体層（第２の誘電体層〕を屓次形
成し、さらにその上にストライプ状の背面電極を形成し
た構造を有してお）、内部のＥＬ素子と外界とを隔離す
るため、カバーガラスを設け、接層剤によシ密閉する構
造がとられていた。Thin film εL panels generally have striped transparent electrodes arranged on a glass substrate, and then a dielectric layer (first dielectric layer), a light emitting layer, and a dielectric layer (second dielectric layer). In order to isolate the internal EL element from the outside world, a cover glass is provided and the structure is sealed with an adhesive. It had been taken.
しかし、接層剤は一般に透湿性があυ、そのために長期
安定性に欠ける欠点があった。However, adhesives generally have moisture permeability, which has the disadvantage of lacking long-term stability.
この点を改善するものとして、背面電極の上方に設けた
カバーガラスの内面に、ゼオライト、シリカゲル等の乾
燥剤を貼着したり、あるいは粉末状態の［Ｌこれらの乾
燥剤をカバーガラスによ多形成される空間内に収容した
ものが提案されている（実開昭５８−６８６９８号公報
）。To improve this point, a desiccant such as zeolite or silica gel may be attached to the inner surface of the cover glass provided above the back electrode, or a drying agent such as powder [L] may be applied to the cover glass. It has been proposed to house it in the space that is formed (Japanese Utility Model Publication No. 58-68698).
このような乾燥剤を入れる方法は、カバーガラス内の水
分を吸収し、湿気による影響を防止するという点ではす
ぐれているが、粉末状態で収容した場合はもちろん、カ
バーガラスに貼着した乾燥剤も、運搬時等の機械的ショ
ックにより剥れ落ち、ＥＬ素子上にそれらの乾燥剤が付
着するようになる。このため、長い間には、乾燥剤中に
含まれるアルカリイオンの影響を第２の誘電体層が受け
、絶縁破壊を起こすことがある。This method of adding a desiccant is excellent in that it absorbs the moisture inside the cover glass and prevents the effects of moisture, but it is not only possible to use the desiccant when it is placed in powder form, but also when the desiccant is attached to the cover glass. The desiccant also peels off due to mechanical shock during transportation, and the desiccant adheres to the EL element. Therefore, over a long period of time, the second dielectric layer may be affected by the alkali ions contained in the desiccant, causing dielectric breakdown.
本発明は、ＥＬ素子を封止するカバーと透明基板とを、
固形状の乾燥剤を混入させた接層剤によって封層したも
のである。The present invention provides a cover for sealing an EL element and a transparent substrate.
It is sealed with a layering agent mixed with a solid desiccant.
封層部の接層剤を通って侵入しようとする湿気は、接層
剤中に混入された乾燥剤により吸収される。一方、乾燥
剤は接層剤によって包囲され固定されている。Moisture that attempts to penetrate through the adhesive in the sealing layer is absorbed by the desiccant incorporated into the adhesive. On the other hand, the desiccant is surrounded and fixed by the adhesive.
第１図は本発明の一実施例を示す断面図である。 FIG. 1 is a sectional view showing one embodiment of the present invention.
同図において、１は石英ガラスからなる透明基板、２は
スズ酸化物？：、混入した酸化インジウムからなるスト
ライプ状の透明電極、３は酸化イツトＩＪウム（Ｙ２
（ｈ ） からなる第１の誘電体層、４は活性物質と
して０．５ｗｔチのマンガンを添加したＺｎＳ ： Ｍ
ｎ焼結ベレットからなるＥＬ発光層、５は第１の誘電体
層３と同様の第２の誘電体層、６はアルミニウムによ）
透明電極２と直交するストライブ状に形成された背面電
極である。透明電極２と背面電極６とが平面的に見て交
差する部分が１絵素を構成し、両ｔｍ間に交流電圧を印
加することによ）発光する。In the figure, 1 is a transparent substrate made of quartz glass, and 2 is tin oxide. :, striped transparent electrode made of mixed indium oxide, 3 is indium oxide (Y2
(h) The first dielectric layer 4 is made of ZnS with 0.5 wt of manganese added as an active material: M
EL light emitting layer made of n sintered pellets, 5 a second dielectric layer similar to the first dielectric layer 3, 6 made of aluminum)
This is a back electrode formed in a stripe shape orthogonal to the transparent electrode 2. A portion where the transparent electrode 2 and the back electrode 6 intersect in plan view constitutes one picture element, which emits light by applying an alternating current voltage between both tm.
このような薄膜ＣＬ素子を空気中の湿気から保護するた
めに、石英ガラスからなるカバー７を、エポキシ系接層
剤８によシ透明基板１に封層している。透明電極２およ
び背面電極６は、その端部がそれぞれエポキシ系接層剤
８による封層部から外部へ引出されている。In order to protect such a thin film CL element from moisture in the air, a cover 7 made of quartz glass is sealed onto the transparent substrate 1 using an epoxy adhesive 8. The ends of the transparent electrode 2 and the back electrode 6 are each drawn out from a sealing layer formed by an epoxy adhesive 8.
ここで、エポキシ系接層剤８には、乾燥剤としてのゼオ
ライト粒子９を混入させて、エポキシ系接層剤８ｔ″通
して浸透する水分を吸収するようにしである。Here, zeolite particles 9 as a desiccant are mixed into the epoxy adhesive 8 to absorb moisture that permeates through the epoxy adhesive 8t''.
次に、上記構造の製造方法を説明する。Next, a method for manufacturing the above structure will be explained.
はじめに、ゼオライト粒子９を１０ｗｔ％のＰＶＡ （
ポリビニルアルコール）溶液に分散させてペースト状に
したものを準備し、第２図に示すようにカバー１の、透
明基板１との封層部に、このペースト１０をスクリーン
印刷によシ塗布する。First, zeolite particles 9 were mixed with 10 wt% PVA (
A paste 10 is prepared by dispersing it in a polyvinyl alcohol) solution, and this paste 10 is applied by screen printing to the sealing layer portion of the cover 1 with the transparent substrate 1, as shown in FIG.
次に、このカバー７を３５０℃に加熱し、ＰＶＡを蒸発
させて、ゼオライト粒子９からなるスペーサを形成する
。Next, this cover 7 is heated to 350° C. to evaporate the PVA to form a spacer made of zeolite particles 9.
一方、透明基板１上に、真空蒸着法にょ）透明電極２（
膜厚２０００Ａ ）、第１の防電体膜３（膜専３００Ｏ
Ａ ）、εＬ発光層４（膜厚５０００Ａ）、第２のｔｉ
’ｍ体層５（膜厚３０００Ａ）および背面電極６（膜厚
３０００Ａ）を順次成膜し、薄膜ＥＬ累子を形成する。On the other hand, a transparent electrode 2 (by vacuum evaporation method) is placed on a transparent substrate 1.
Film thickness 2000A), first electric shield film 3 (film thickness 300A)
A), εL light emitting layer 4 (film thickness 5000A), second ti
The body layer 5 (thickness: 3000 A) and the back electrode 6 (thickness: 3000 A) are sequentially formed to form a thin film EL transducer.
これらのスペーサを形成したカバー７と、薄膜ＥＬ素子
を形成した透明基板１とを十分に加熱しく約１２０℃）
、水分を追い出した上で、１２０〜１３０℃に７）Ｄｐ
Ｐｌされたホットプレート上で重ね合せる。このとき、
上記スペーサによって、両者の間隔が規定される。その
状態で、注射器（ディスペンサー）により、熱硬化性の
エポキシ系接層剤８をカバー７と透明基板１との間に流
し込む。接層剤の粘性を適当にすることにより、接層剤
はスペーサを構成するゼオライト粒子９間を通）抜け、
当該ゼオライト粒子９を包み込むように取υ囲んで、ゼ
オライト粒子９が接層剤に混入された状態となる。次に
、これを１３０℃で１５〜２０分間那熱し、接層剤を硬
化させる。The cover 7 on which these spacers are formed and the transparent substrate 1 on which the thin film EL element is formed are sufficiently heated to about 120°C).
7)Dp to 120-130℃ after removing moisture
Lay them out on a heated hot plate. At this time,
The distance between the two is defined by the spacer. In this state, a thermosetting epoxy adhesive 8 is poured between the cover 7 and the transparent substrate 1 using a syringe (dispenser). By adjusting the viscosity of the layering agent appropriately, the layering agent can pass through the zeolite particles 9 constituting the spacer,
The zeolite particles 9 are surrounded and mixed into the layering agent. Next, this is heated at 130° C. for 15 to 20 minutes to harden the adhesive.
このようにしてゼオライト粒子９を混入させることによ
シ、前述したようにエポキシ系接層剤８を通して浸透す
る水分を吸収し、内部の薄膜ＥＬ素子に悪影響を与える
のを防ぐことができる。また、ゼオライトは、一般式Ｗ
ｍｚｎＯ２ｎ−９Ｈ２０（ＷはＮａ、Ｃａ、に等、２は
Ｓｉ ＋Ａｔ（Ｓｔ ：Ａｔ＞１）、ｓは一定しない）
で示される含水ケイ酸であり、アルカリイオンを含むが
、上述したように本実施例では、ゼオライト粒子９をエ
ポキシ系接層剤８で包囲し固定することによって、薄膜
ＥＩ４子上に剥れ落ちるのを防いでいる。By mixing the zeolite particles 9 in this way, it is possible to absorb moisture that permeates through the epoxy adhesive 8 as described above, and prevent it from adversely affecting the thin film EL element inside. In addition, zeolite has the general formula W
mznO2n-9H20 (W is Na, Ca, etc., 2 is Si + At (St:At>1), s is not constant)
It is a hydrous silicic acid represented by and contains alkali ions, but as mentioned above, in this example, by surrounding and fixing the zeolite particles 9 with the epoxy adhesive 8, the zeolite particles 9 are peeled off onto the thin film EI4. It prevents
以上、ゼオライト粒子９をＰＶＡ Ｂ液に分散させてカ
バー７に塗布する場合について説明したが、ゼオライト
粒子９を直接、接層剤に分散させ、これをスクリーン印
刷等によシカバー７に塗布するようにしてもよい。この
場合、接層剤の粘性が高いと、スクリーン印刷によυ塗
布が難しくなるため、適当な希釈剤、例えば熱硬化性の
エポキシ系接層剤であればエーテルを用いて希釈すれば
よい。The case where the zeolite particles 9 are dispersed in PVA liquid B and applied to the cover 7 has been described above, but it is also possible to directly disperse the zeolite particles 9 in an adhesive and apply this to the cover 7 by screen printing, etc. You may also do so. In this case, if the viscosity of the adhesive is high, it will be difficult to apply it by screen printing, so if it is a thermosetting epoxy adhesive, it may be diluted with an appropriate diluent, such as ether.
この熱硬化性の接層剤、希釈剤および乾燥剤の混合物を
スクリーン印刷によりカバー７に塗布し、次にこのカバ
ー１を加熱し、希釈剤を蒸発させるとともに接層剤を硬
化させる。これにより、乾燥剤が固定されるとともに、
接層剤中の水分も除去される。このようにしてスペーサ
を形成したカバー７と透明基板１とを、前述したと同様
に、外周部において接層剤によ）封層する。この接層剤
は、スペーサを構成する接層剤と同じものでもよいし、
他の接層剤（例えばシリコーン樹脂）でもよい。This mixture of thermosetting entrainer, diluent and drying agent is applied to the cover 7 by screen printing, and the cover 1 is then heated to evaporate the diluent and cure the entrainer. This fixes the desiccant and
Moisture in the adhesive is also removed. The cover 7 and the transparent substrate 1 with the spacers formed in this way are sealed at the outer periphery using a layering agent in the same manner as described above. This adhesive may be the same as the adhesive that constitutes the spacer, or
Other adhesives (eg silicone resins) may also be used.
なお、乾燥剤はゼオライトに限らない。例えば、市販の
シリカゲルにはＮａ−？Ｋが含まれておυ、これを乾燥
剤として用いる場合にも、本発明は有効である。Note that the desiccant is not limited to zeolite. For example, commercially available silica gel contains Na-? The present invention is also effective when K is contained and used as a desiccant.
以上説明した実施例においては、透明基板１とカバー７
の双方を石英ガラスで構成したが、これらは必ずしも同
一の材質でなくても、熱膨張係数がほぼ等しいものであ
ればよく、例えばアルミノシリケートガラス、ソーダラ
イムガラス等の多成分系のガラスでもよい。また、エポ
キシ系接層剤８の代υに、上述したシリコーン樹脂など
、耐熱性・耐湿性にすぐれた他の接層剤を用いてもよい
。In the embodiment described above, the transparent substrate 1 and the cover 7
Although both are made of quartz glass, they do not necessarily need to be made of the same material, as long as they have approximately the same coefficient of thermal expansion; for example, multi-component glass such as aluminosilicate glass or soda lime glass may be used. . Further, instead of the epoxy adhesive 8, other adhesives having excellent heat resistance and moisture resistance, such as the silicone resin described above, may be used.
この接層剤は、熱硬化性である必要はなく、常温硬化性
であってもよい。This adhesive does not need to be thermosetting, and may be room temperature curable.
以上説明したように、本発明によれば、ＥＬ素子を封止
するカバーと透明基板とを、固形状の乾燥剤を含有する
接層剤によって封層したことによシ、接層剤中の水分お
よび接層剤を通って外部から侵入する水分を乾燥剤で吸
収し、湿気によシ発光表示に悪影響が及ぶのを防止でき
る。他方、乾燥剤は接層剤で包囲され固定されておυ、
乾燥剤がＥＬ素子上に落ちて、そのアルカリイオンがＥ
Ｌ素子の電気的特性に悪影響を与えることを防止できる
。しかもこれらの封止材料は安価なものでよく、特別な
封止装置等を必要とするものでもなく、この点において
も、本発明の有用性はきわめて大きい。As explained above, according to the present invention, the cover for sealing the EL element and the transparent substrate are sealed with the adhesive containing a solid desiccant. The desiccant absorbs moisture and moisture that enters from the outside through the adhesive, thereby preventing moisture from adversely affecting the luminescent display. On the other hand, the desiccant is surrounded and fixed by the adhesive, υ,
When the desiccant falls on the EL element, its alkali ions become E
It is possible to prevent an adverse effect on the electrical characteristics of the L element. Furthermore, these sealing materials may be inexpensive and do not require any special sealing equipment, and in this respect as well, the usefulness of the present invention is extremely large.
第１図は本発明の一実施例を示す断面図、第２図は封層
前のカバーを示す断面図である。
１・・・・透明基板、２・・・・透明電極、３．５・・
・・誘電体層、４・・・・ＥＬ発光層、６・・・・背面
電極、７・・・・カバー、８・・・・エポキシ系接層剤
、９・・働・ゼオライト粒子。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a cover before sealing. 1...Transparent substrate, 2...Transparent electrode, 3.5...
...Dielectric layer, 4...EL light emitting layer, 6...Back electrode, 7...Cover, 8...Epoxy adhesive, 9...Working zeolite particles.
Claims (1)
と、この透明電極に積層したＥＬ発光層および誘電体層
と、これらＥＬ発光層および誘電体層を介して透明電極
に対向する背面電極とからなるＥＬ素子を形成し、この
ＥＬ素子を、固形状の乾燥剤を混入させた接層剤によつ
て、周辺部を上記透明基板に封層したカバー内に封止し
てなる薄膜ＥＬパネル。A transparent electrode is provided on a transparent substrate, an EL light emitting layer and a dielectric layer laminated on the transparent electrode, a back electrode facing the transparent electrode via the EL light emitting layer and the dielectric layer. A thin film EL is formed by forming an EL element consisting of the above, and sealing this EL element in a cover whose peripheral portion is sealed to the transparent substrate using a layering agent mixed with a solid desiccant. panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123522A JPS62281294A (en) | 1986-05-30 | 1986-05-30 | Thin film el panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123522A JPS62281294A (en) | 1986-05-30 | 1986-05-30 | Thin film el panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62281294A true JPS62281294A (en) | 1987-12-07 |
Family
ID=14862694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61123522A Pending JPS62281294A (en) | 1986-05-30 | 1986-05-30 | Thin film el panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62281294A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03121700U (en) * | 1990-02-21 | 1991-12-12 | ||
| JPH046196U (en) * | 1990-04-27 | 1992-01-21 | ||
| WO2014050138A1 (en) * | 2012-09-28 | 2014-04-03 | パナソニック株式会社 | Display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944633A (en) * | 1982-09-08 | 1984-03-13 | Fuji Xerox Co Ltd | Temperature detector of heating roll type fixation device |
| JPS6113594A (en) * | 1984-06-27 | 1986-01-21 | ホ−ヤ株式会社 | Method of sealing thin film el element |
-
1986
- 1986-05-30 JP JP61123522A patent/JPS62281294A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944633A (en) * | 1982-09-08 | 1984-03-13 | Fuji Xerox Co Ltd | Temperature detector of heating roll type fixation device |
| JPS6113594A (en) * | 1984-06-27 | 1986-01-21 | ホ−ヤ株式会社 | Method of sealing thin film el element |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03121700U (en) * | 1990-02-21 | 1991-12-12 | ||
| JPH046196U (en) * | 1990-04-27 | 1992-01-21 | ||
| WO2014050138A1 (en) * | 2012-09-28 | 2014-04-03 | パナソニック株式会社 | Display device |
| CN104685554A (en) * | 2012-09-28 | 2015-06-03 | 松下知识产权经营株式会社 | Display device |
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